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<FONT color="green">001</FONT>    /*<a name="line.1"></a>
<FONT color="green">002</FONT>     * Licensed to the Apache Software Foundation (ASF) under one or more<a name="line.2"></a>
<FONT color="green">003</FONT>     * contributor license agreements.  See the NOTICE file distributed with<a name="line.3"></a>
<FONT color="green">004</FONT>     * this work for additional information regarding copyright ownership.<a name="line.4"></a>
<FONT color="green">005</FONT>     * The ASF licenses this file to You under the Apache License, Version 2.0<a name="line.5"></a>
<FONT color="green">006</FONT>     * (the "License"); you may not use this file except in compliance with<a name="line.6"></a>
<FONT color="green">007</FONT>     * the License.  You may obtain a copy of the License at<a name="line.7"></a>
<FONT color="green">008</FONT>     * <a name="line.8"></a>
<FONT color="green">009</FONT>     *      http://www.apache.org/licenses/LICENSE-2.0<a name="line.9"></a>
<FONT color="green">010</FONT>     * <a name="line.10"></a>
<FONT color="green">011</FONT>     * Unless required by applicable law or agreed to in writing, software<a name="line.11"></a>
<FONT color="green">012</FONT>     * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.12"></a>
<FONT color="green">013</FONT>     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.13"></a>
<FONT color="green">014</FONT>     * See the License for the specific language governing permissions and<a name="line.14"></a>
<FONT color="green">015</FONT>     * limitations under the License.<a name="line.15"></a>
<FONT color="green">016</FONT>     */<a name="line.16"></a>
<FONT color="green">017</FONT>    package org.apache.commons.lang3;<a name="line.17"></a>
<FONT color="green">018</FONT>    <a name="line.18"></a>
<FONT color="green">019</FONT>    import java.util.ArrayList;<a name="line.19"></a>
<FONT color="green">020</FONT>    import java.util.Arrays;<a name="line.20"></a>
<FONT color="green">021</FONT>    import java.util.Collections;<a name="line.21"></a>
<FONT color="green">022</FONT>    import java.util.HashSet;<a name="line.22"></a>
<FONT color="green">023</FONT>    import java.util.List;<a name="line.23"></a>
<FONT color="green">024</FONT>    import java.util.Locale;<a name="line.24"></a>
<FONT color="green">025</FONT>    import java.util.Set;<a name="line.25"></a>
<FONT color="green">026</FONT>    import java.util.concurrent.ConcurrentHashMap;<a name="line.26"></a>
<FONT color="green">027</FONT>    import java.util.concurrent.ConcurrentMap;<a name="line.27"></a>
<FONT color="green">028</FONT>    <a name="line.28"></a>
<FONT color="green">029</FONT>    /**<a name="line.29"></a>
<FONT color="green">030</FONT>     * &lt;p&gt;Operations to assist when working with a {@link Locale}.&lt;/p&gt;<a name="line.30"></a>
<FONT color="green">031</FONT>     *<a name="line.31"></a>
<FONT color="green">032</FONT>     * &lt;p&gt;This class tries to handle {@code null} input gracefully.<a name="line.32"></a>
<FONT color="green">033</FONT>     * An exception will not be thrown for a {@code null} input.<a name="line.33"></a>
<FONT color="green">034</FONT>     * Each method documents its behaviour in more detail.&lt;/p&gt;<a name="line.34"></a>
<FONT color="green">035</FONT>     *<a name="line.35"></a>
<FONT color="green">036</FONT>     * @since 2.2<a name="line.36"></a>
<FONT color="green">037</FONT>     * @version $Id: LocaleUtils.java 1090563 2011-04-09 11:00:10Z sebb $<a name="line.37"></a>
<FONT color="green">038</FONT>     */<a name="line.38"></a>
<FONT color="green">039</FONT>    public class LocaleUtils {<a name="line.39"></a>
<FONT color="green">040</FONT>    <a name="line.40"></a>
<FONT color="green">041</FONT>        /** Concurrent map of language locales by country. */<a name="line.41"></a>
<FONT color="green">042</FONT>        private static final ConcurrentMap&lt;String, List&lt;Locale&gt;&gt; cLanguagesByCountry = <a name="line.42"></a>
<FONT color="green">043</FONT>            new ConcurrentHashMap&lt;String, List&lt;Locale&gt;&gt;();<a name="line.43"></a>
<FONT color="green">044</FONT>    <a name="line.44"></a>
<FONT color="green">045</FONT>        /** Concurrent map of country locales by language. */<a name="line.45"></a>
<FONT color="green">046</FONT>        private static final ConcurrentMap&lt;String, List&lt;Locale&gt;&gt; cCountriesByLanguage = <a name="line.46"></a>
<FONT color="green">047</FONT>            new ConcurrentHashMap&lt;String, List&lt;Locale&gt;&gt;();<a name="line.47"></a>
<FONT color="green">048</FONT>    <a name="line.48"></a>
<FONT color="green">049</FONT>        /**<a name="line.49"></a>
<FONT color="green">050</FONT>         * &lt;p&gt;{@code LocaleUtils} instances should NOT be constructed in standard programming.<a name="line.50"></a>
<FONT color="green">051</FONT>         * Instead, the class should be used as {@code LocaleUtils.toLocale("en_GB");}.&lt;/p&gt;<a name="line.51"></a>
<FONT color="green">052</FONT>         *<a name="line.52"></a>
<FONT color="green">053</FONT>         * &lt;p&gt;This constructor is public to permit tools that require a JavaBean instance<a name="line.53"></a>
<FONT color="green">054</FONT>         * to operate.&lt;/p&gt;<a name="line.54"></a>
<FONT color="green">055</FONT>         */<a name="line.55"></a>
<FONT color="green">056</FONT>        public LocaleUtils() {<a name="line.56"></a>
<FONT color="green">057</FONT>          super();<a name="line.57"></a>
<FONT color="green">058</FONT>        }<a name="line.58"></a>
<FONT color="green">059</FONT>    <a name="line.59"></a>
<FONT color="green">060</FONT>        //-----------------------------------------------------------------------<a name="line.60"></a>
<FONT color="green">061</FONT>        /**<a name="line.61"></a>
<FONT color="green">062</FONT>         * &lt;p&gt;Converts a String to a Locale.&lt;/p&gt;<a name="line.62"></a>
<FONT color="green">063</FONT>         *<a name="line.63"></a>
<FONT color="green">064</FONT>         * &lt;p&gt;This method takes the string format of a locale and creates the<a name="line.64"></a>
<FONT color="green">065</FONT>         * locale object from it.&lt;/p&gt;<a name="line.65"></a>
<FONT color="green">066</FONT>         *<a name="line.66"></a>
<FONT color="green">067</FONT>         * &lt;pre&gt;<a name="line.67"></a>
<FONT color="green">068</FONT>         *   LocaleUtils.toLocale("en")         = new Locale("en", "")<a name="line.68"></a>
<FONT color="green">069</FONT>         *   LocaleUtils.toLocale("en_GB")      = new Locale("en", "GB")<a name="line.69"></a>
<FONT color="green">070</FONT>         *   LocaleUtils.toLocale("en_GB_xxx")  = new Locale("en", "GB", "xxx")   (#)<a name="line.70"></a>
<FONT color="green">071</FONT>         * &lt;/pre&gt;<a name="line.71"></a>
<FONT color="green">072</FONT>         *<a name="line.72"></a>
<FONT color="green">073</FONT>         * &lt;p&gt;(#) The behaviour of the JDK variant constructor changed between JDK1.3 and JDK1.4.<a name="line.73"></a>
<FONT color="green">074</FONT>         * In JDK1.3, the constructor upper cases the variant, in JDK1.4, it doesn't.<a name="line.74"></a>
<FONT color="green">075</FONT>         * Thus, the result from getVariant() may vary depending on your JDK.&lt;/p&gt;<a name="line.75"></a>
<FONT color="green">076</FONT>         *<a name="line.76"></a>
<FONT color="green">077</FONT>         * &lt;p&gt;This method validates the input strictly.<a name="line.77"></a>
<FONT color="green">078</FONT>         * The language code must be lowercase.<a name="line.78"></a>
<FONT color="green">079</FONT>         * The country code must be uppercase.<a name="line.79"></a>
<FONT color="green">080</FONT>         * The separator must be an underscore.<a name="line.80"></a>
<FONT color="green">081</FONT>         * The length must be correct.<a name="line.81"></a>
<FONT color="green">082</FONT>         * &lt;/p&gt;<a name="line.82"></a>
<FONT color="green">083</FONT>         *<a name="line.83"></a>
<FONT color="green">084</FONT>         * @param str  the locale String to convert, null returns null<a name="line.84"></a>
<FONT color="green">085</FONT>         * @return a Locale, null if null input<a name="line.85"></a>
<FONT color="green">086</FONT>         * @throws IllegalArgumentException if the string is an invalid format<a name="line.86"></a>
<FONT color="green">087</FONT>         */<a name="line.87"></a>
<FONT color="green">088</FONT>        public static Locale toLocale(String str) {<a name="line.88"></a>
<FONT color="green">089</FONT>            if (str == null) {<a name="line.89"></a>
<FONT color="green">090</FONT>                return null;<a name="line.90"></a>
<FONT color="green">091</FONT>            }<a name="line.91"></a>
<FONT color="green">092</FONT>            int len = str.length();<a name="line.92"></a>
<FONT color="green">093</FONT>            if (len != 2 &amp;&amp; len != 5 &amp;&amp; len &lt; 7) {<a name="line.93"></a>
<FONT color="green">094</FONT>                throw new IllegalArgumentException("Invalid locale format: " + str);<a name="line.94"></a>
<FONT color="green">095</FONT>            }<a name="line.95"></a>
<FONT color="green">096</FONT>            char ch0 = str.charAt(0);<a name="line.96"></a>
<FONT color="green">097</FONT>            char ch1 = str.charAt(1);<a name="line.97"></a>
<FONT color="green">098</FONT>            if (ch0 &lt; 'a' || ch0 &gt; 'z' || ch1 &lt; 'a' || ch1 &gt; 'z') {<a name="line.98"></a>
<FONT color="green">099</FONT>                throw new IllegalArgumentException("Invalid locale format: " + str);<a name="line.99"></a>
<FONT color="green">100</FONT>            }<a name="line.100"></a>
<FONT color="green">101</FONT>            if (len == 2) {<a name="line.101"></a>
<FONT color="green">102</FONT>                return new Locale(str, "");<a name="line.102"></a>
<FONT color="green">103</FONT>            } else {<a name="line.103"></a>
<FONT color="green">104</FONT>                if (str.charAt(2) != '_') {<a name="line.104"></a>
<FONT color="green">105</FONT>                    throw new IllegalArgumentException("Invalid locale format: " + str);<a name="line.105"></a>
<FONT color="green">106</FONT>                }<a name="line.106"></a>
<FONT color="green">107</FONT>                char ch3 = str.charAt(3);<a name="line.107"></a>
<FONT color="green">108</FONT>                if (ch3 == '_') {<a name="line.108"></a>
<FONT color="green">109</FONT>                    return new Locale(str.substring(0, 2), "", str.substring(4));<a name="line.109"></a>
<FONT color="green">110</FONT>                }<a name="line.110"></a>
<FONT color="green">111</FONT>                char ch4 = str.charAt(4);<a name="line.111"></a>
<FONT color="green">112</FONT>                if (ch3 &lt; 'A' || ch3 &gt; 'Z' || ch4 &lt; 'A' || ch4 &gt; 'Z') {<a name="line.112"></a>
<FONT color="green">113</FONT>                    throw new IllegalArgumentException("Invalid locale format: " + str);<a name="line.113"></a>
<FONT color="green">114</FONT>                }<a name="line.114"></a>
<FONT color="green">115</FONT>                if (len == 5) {<a name="line.115"></a>
<FONT color="green">116</FONT>                    return new Locale(str.substring(0, 2), str.substring(3, 5));<a name="line.116"></a>
<FONT color="green">117</FONT>                } else {<a name="line.117"></a>
<FONT color="green">118</FONT>                    if (str.charAt(5) != '_') {<a name="line.118"></a>
<FONT color="green">119</FONT>                        throw new IllegalArgumentException("Invalid locale format: " + str);<a name="line.119"></a>
<FONT color="green">120</FONT>                    }<a name="line.120"></a>
<FONT color="green">121</FONT>                    return new Locale(str.substring(0, 2), str.substring(3, 5), str.substring(6));<a name="line.121"></a>
<FONT color="green">122</FONT>                }<a name="line.122"></a>
<FONT color="green">123</FONT>            }<a name="line.123"></a>
<FONT color="green">124</FONT>        }<a name="line.124"></a>
<FONT color="green">125</FONT>    <a name="line.125"></a>
<FONT color="green">126</FONT>        //-----------------------------------------------------------------------<a name="line.126"></a>
<FONT color="green">127</FONT>        /**<a name="line.127"></a>
<FONT color="green">128</FONT>         * &lt;p&gt;Obtains the list of locales to search through when performing<a name="line.128"></a>
<FONT color="green">129</FONT>         * a locale search.&lt;/p&gt;<a name="line.129"></a>
<FONT color="green">130</FONT>         *<a name="line.130"></a>
<FONT color="green">131</FONT>         * &lt;pre&gt;<a name="line.131"></a>
<FONT color="green">132</FONT>         * localeLookupList(Locale("fr","CA","xxx"))<a name="line.132"></a>
<FONT color="green">133</FONT>         *   = [Locale("fr","CA","xxx"), Locale("fr","CA"), Locale("fr")]<a name="line.133"></a>
<FONT color="green">134</FONT>         * &lt;/pre&gt;<a name="line.134"></a>
<FONT color="green">135</FONT>         *<a name="line.135"></a>
<FONT color="green">136</FONT>         * @param locale  the locale to start from<a name="line.136"></a>
<FONT color="green">137</FONT>         * @return the unmodifiable list of Locale objects, 0 being locale, not null<a name="line.137"></a>
<FONT color="green">138</FONT>         */<a name="line.138"></a>
<FONT color="green">139</FONT>        public static List&lt;Locale&gt; localeLookupList(Locale locale) {<a name="line.139"></a>
<FONT color="green">140</FONT>            return localeLookupList(locale, locale);<a name="line.140"></a>
<FONT color="green">141</FONT>        }<a name="line.141"></a>
<FONT color="green">142</FONT>    <a name="line.142"></a>
<FONT color="green">143</FONT>        //-----------------------------------------------------------------------<a name="line.143"></a>
<FONT color="green">144</FONT>        /**<a name="line.144"></a>
<FONT color="green">145</FONT>         * &lt;p&gt;Obtains the list of locales to search through when performing<a name="line.145"></a>
<FONT color="green">146</FONT>         * a locale search.&lt;/p&gt;<a name="line.146"></a>
<FONT color="green">147</FONT>         *<a name="line.147"></a>
<FONT color="green">148</FONT>         * &lt;pre&gt;<a name="line.148"></a>
<FONT color="green">149</FONT>         * localeLookupList(Locale("fr", "CA", "xxx"), Locale("en"))<a name="line.149"></a>
<FONT color="green">150</FONT>         *   = [Locale("fr","CA","xxx"), Locale("fr","CA"), Locale("fr"), Locale("en"]<a name="line.150"></a>
<FONT color="green">151</FONT>         * &lt;/pre&gt;<a name="line.151"></a>
<FONT color="green">152</FONT>         *<a name="line.152"></a>
<FONT color="green">153</FONT>         * &lt;p&gt;The result list begins with the most specific locale, then the<a name="line.153"></a>
<FONT color="green">154</FONT>         * next more general and so on, finishing with the default locale.<a name="line.154"></a>
<FONT color="green">155</FONT>         * The list will never contain the same locale twice.&lt;/p&gt;<a name="line.155"></a>
<FONT color="green">156</FONT>         *<a name="line.156"></a>
<FONT color="green">157</FONT>         * @param locale  the locale to start from, null returns empty list<a name="line.157"></a>
<FONT color="green">158</FONT>         * @param defaultLocale  the default locale to use if no other is found<a name="line.158"></a>
<FONT color="green">159</FONT>         * @return the unmodifiable list of Locale objects, 0 being locale, not null<a name="line.159"></a>
<FONT color="green">160</FONT>         */<a name="line.160"></a>
<FONT color="green">161</FONT>        public static List&lt;Locale&gt; localeLookupList(Locale locale, Locale defaultLocale) {<a name="line.161"></a>
<FONT color="green">162</FONT>            List&lt;Locale&gt; list = new ArrayList&lt;Locale&gt;(4);<a name="line.162"></a>
<FONT color="green">163</FONT>            if (locale != null) {<a name="line.163"></a>
<FONT color="green">164</FONT>                list.add(locale);<a name="line.164"></a>
<FONT color="green">165</FONT>                if (locale.getVariant().length() &gt; 0) {<a name="line.165"></a>
<FONT color="green">166</FONT>                    list.add(new Locale(locale.getLanguage(), locale.getCountry()));<a name="line.166"></a>
<FONT color="green">167</FONT>                }<a name="line.167"></a>
<FONT color="green">168</FONT>                if (locale.getCountry().length() &gt; 0) {<a name="line.168"></a>
<FONT color="green">169</FONT>                    list.add(new Locale(locale.getLanguage(), ""));<a name="line.169"></a>
<FONT color="green">170</FONT>                }<a name="line.170"></a>
<FONT color="green">171</FONT>                if (list.contains(defaultLocale) == false) {<a name="line.171"></a>
<FONT color="green">172</FONT>                    list.add(defaultLocale);<a name="line.172"></a>
<FONT color="green">173</FONT>                }<a name="line.173"></a>
<FONT color="green">174</FONT>            }<a name="line.174"></a>
<FONT color="green">175</FONT>            return Collections.unmodifiableList(list);<a name="line.175"></a>
<FONT color="green">176</FONT>        }<a name="line.176"></a>
<FONT color="green">177</FONT>    <a name="line.177"></a>
<FONT color="green">178</FONT>        //-----------------------------------------------------------------------<a name="line.178"></a>
<FONT color="green">179</FONT>        /**<a name="line.179"></a>
<FONT color="green">180</FONT>         * &lt;p&gt;Obtains an unmodifiable list of installed locales.&lt;/p&gt;<a name="line.180"></a>
<FONT color="green">181</FONT>         * <a name="line.181"></a>
<FONT color="green">182</FONT>         * &lt;p&gt;This method is a wrapper around {@link Locale#getAvailableLocales()}.<a name="line.182"></a>
<FONT color="green">183</FONT>         * It is more efficient, as the JDK method must create a new array each<a name="line.183"></a>
<FONT color="green">184</FONT>         * time it is called.&lt;/p&gt;<a name="line.184"></a>
<FONT color="green">185</FONT>         *<a name="line.185"></a>
<FONT color="green">186</FONT>         * @return the unmodifiable list of available locales<a name="line.186"></a>
<FONT color="green">187</FONT>         */<a name="line.187"></a>
<FONT color="green">188</FONT>        public static List&lt;Locale&gt; availableLocaleList() {<a name="line.188"></a>
<FONT color="green">189</FONT>            return SyncAvoid.AVAILABLE_LOCALE_LIST;<a name="line.189"></a>
<FONT color="green">190</FONT>        }<a name="line.190"></a>
<FONT color="green">191</FONT>    <a name="line.191"></a>
<FONT color="green">192</FONT>        //-----------------------------------------------------------------------<a name="line.192"></a>
<FONT color="green">193</FONT>        /**<a name="line.193"></a>
<FONT color="green">194</FONT>         * &lt;p&gt;Obtains an unmodifiable set of installed locales.&lt;/p&gt;<a name="line.194"></a>
<FONT color="green">195</FONT>         * <a name="line.195"></a>
<FONT color="green">196</FONT>         * &lt;p&gt;This method is a wrapper around {@link Locale#getAvailableLocales()}.<a name="line.196"></a>
<FONT color="green">197</FONT>         * It is more efficient, as the JDK method must create a new array each<a name="line.197"></a>
<FONT color="green">198</FONT>         * time it is called.&lt;/p&gt;<a name="line.198"></a>
<FONT color="green">199</FONT>         *<a name="line.199"></a>
<FONT color="green">200</FONT>         * @return the unmodifiable set of available locales<a name="line.200"></a>
<FONT color="green">201</FONT>         */<a name="line.201"></a>
<FONT color="green">202</FONT>        public static Set&lt;Locale&gt; availableLocaleSet() {<a name="line.202"></a>
<FONT color="green">203</FONT>            return SyncAvoid.AVAILABLE_LOCALE_SET;<a name="line.203"></a>
<FONT color="green">204</FONT>        }<a name="line.204"></a>
<FONT color="green">205</FONT>    <a name="line.205"></a>
<FONT color="green">206</FONT>        //-----------------------------------------------------------------------<a name="line.206"></a>
<FONT color="green">207</FONT>        /**<a name="line.207"></a>
<FONT color="green">208</FONT>         * &lt;p&gt;Checks if the locale specified is in the list of available locales.&lt;/p&gt;<a name="line.208"></a>
<FONT color="green">209</FONT>         *<a name="line.209"></a>
<FONT color="green">210</FONT>         * @param locale the Locale object to check if it is available<a name="line.210"></a>
<FONT color="green">211</FONT>         * @return true if the locale is a known locale<a name="line.211"></a>
<FONT color="green">212</FONT>         */<a name="line.212"></a>
<FONT color="green">213</FONT>        public static boolean isAvailableLocale(Locale locale) {<a name="line.213"></a>
<FONT color="green">214</FONT>            return availableLocaleList().contains(locale);<a name="line.214"></a>
<FONT color="green">215</FONT>        }<a name="line.215"></a>
<FONT color="green">216</FONT>    <a name="line.216"></a>
<FONT color="green">217</FONT>        //-----------------------------------------------------------------------<a name="line.217"></a>
<FONT color="green">218</FONT>        /**<a name="line.218"></a>
<FONT color="green">219</FONT>         * &lt;p&gt;Obtains the list of languages supported for a given country.&lt;/p&gt;<a name="line.219"></a>
<FONT color="green">220</FONT>         *<a name="line.220"></a>
<FONT color="green">221</FONT>         * &lt;p&gt;This method takes a country code and searches to find the<a name="line.221"></a>
<FONT color="green">222</FONT>         * languages available for that country. Variant locales are removed.&lt;/p&gt;<a name="line.222"></a>
<FONT color="green">223</FONT>         *<a name="line.223"></a>
<FONT color="green">224</FONT>         * @param countryCode  the 2 letter country code, null returns empty<a name="line.224"></a>
<FONT color="green">225</FONT>         * @return an unmodifiable List of Locale objects, not null<a name="line.225"></a>
<FONT color="green">226</FONT>         */<a name="line.226"></a>
<FONT color="green">227</FONT>        public static List&lt;Locale&gt; languagesByCountry(String countryCode) {<a name="line.227"></a>
<FONT color="green">228</FONT>            if (countryCode == null) {<a name="line.228"></a>
<FONT color="green">229</FONT>                return Collections.emptyList();<a name="line.229"></a>
<FONT color="green">230</FONT>            }<a name="line.230"></a>
<FONT color="green">231</FONT>            List&lt;Locale&gt; langs = cLanguagesByCountry.get(countryCode);<a name="line.231"></a>
<FONT color="green">232</FONT>            if (langs == null) {<a name="line.232"></a>
<FONT color="green">233</FONT>                langs = new ArrayList&lt;Locale&gt;();<a name="line.233"></a>
<FONT color="green">234</FONT>                List&lt;Locale&gt; locales = availableLocaleList();<a name="line.234"></a>
<FONT color="green">235</FONT>                for (int i = 0; i &lt; locales.size(); i++) {<a name="line.235"></a>
<FONT color="green">236</FONT>                    Locale locale = locales.get(i);<a name="line.236"></a>
<FONT color="green">237</FONT>                    if (countryCode.equals(locale.getCountry()) &amp;&amp;<a name="line.237"></a>
<FONT color="green">238</FONT>                            locale.getVariant().length() == 0) {<a name="line.238"></a>
<FONT color="green">239</FONT>                        langs.add(locale);<a name="line.239"></a>
<FONT color="green">240</FONT>                    }<a name="line.240"></a>
<FONT color="green">241</FONT>                }<a name="line.241"></a>
<FONT color="green">242</FONT>                langs = Collections.unmodifiableList(langs);<a name="line.242"></a>
<FONT color="green">243</FONT>                cLanguagesByCountry.putIfAbsent(countryCode, langs);<a name="line.243"></a>
<FONT color="green">244</FONT>                langs = cLanguagesByCountry.get(countryCode);<a name="line.244"></a>
<FONT color="green">245</FONT>            }<a name="line.245"></a>
<FONT color="green">246</FONT>            return langs;<a name="line.246"></a>
<FONT color="green">247</FONT>        }<a name="line.247"></a>
<FONT color="green">248</FONT>    <a name="line.248"></a>
<FONT color="green">249</FONT>        //-----------------------------------------------------------------------<a name="line.249"></a>
<FONT color="green">250</FONT>        /**<a name="line.250"></a>
<FONT color="green">251</FONT>         * &lt;p&gt;Obtains the list of countries supported for a given language.&lt;/p&gt;<a name="line.251"></a>
<FONT color="green">252</FONT>         * <a name="line.252"></a>
<FONT color="green">253</FONT>         * &lt;p&gt;This method takes a language code and searches to find the<a name="line.253"></a>
<FONT color="green">254</FONT>         * countries available for that language. Variant locales are removed.&lt;/p&gt;<a name="line.254"></a>
<FONT color="green">255</FONT>         *<a name="line.255"></a>
<FONT color="green">256</FONT>         * @param languageCode  the 2 letter language code, null returns empty<a name="line.256"></a>
<FONT color="green">257</FONT>         * @return an unmodifiable List of Locale objects, not null<a name="line.257"></a>
<FONT color="green">258</FONT>         */<a name="line.258"></a>
<FONT color="green">259</FONT>        public static List&lt;Locale&gt; countriesByLanguage(String languageCode) {<a name="line.259"></a>
<FONT color="green">260</FONT>            if (languageCode == null) {<a name="line.260"></a>
<FONT color="green">261</FONT>                return Collections.emptyList();<a name="line.261"></a>
<FONT color="green">262</FONT>            }<a name="line.262"></a>
<FONT color="green">263</FONT>            List&lt;Locale&gt; countries = cCountriesByLanguage.get(languageCode);<a name="line.263"></a>
<FONT color="green">264</FONT>            if (countries == null) {<a name="line.264"></a>
<FONT color="green">265</FONT>                countries = new ArrayList&lt;Locale&gt;();<a name="line.265"></a>
<FONT color="green">266</FONT>                List&lt;Locale&gt; locales = availableLocaleList();<a name="line.266"></a>
<FONT color="green">267</FONT>                for (int i = 0; i &lt; locales.size(); i++) {<a name="line.267"></a>
<FONT color="green">268</FONT>                    Locale locale = locales.get(i);<a name="line.268"></a>
<FONT color="green">269</FONT>                    if (languageCode.equals(locale.getLanguage()) &amp;&amp;<a name="line.269"></a>
<FONT color="green">270</FONT>                            locale.getCountry().length() != 0 &amp;&amp;<a name="line.270"></a>
<FONT color="green">271</FONT>                            locale.getVariant().length() == 0) {<a name="line.271"></a>
<FONT color="green">272</FONT>                        countries.add(locale);<a name="line.272"></a>
<FONT color="green">273</FONT>                    }<a name="line.273"></a>
<FONT color="green">274</FONT>                }<a name="line.274"></a>
<FONT color="green">275</FONT>                countries = Collections.unmodifiableList(countries);<a name="line.275"></a>
<FONT color="green">276</FONT>                cCountriesByLanguage.putIfAbsent(languageCode, countries);<a name="line.276"></a>
<FONT color="green">277</FONT>                countries = cCountriesByLanguage.get(languageCode);<a name="line.277"></a>
<FONT color="green">278</FONT>            }<a name="line.278"></a>
<FONT color="green">279</FONT>            return countries;<a name="line.279"></a>
<FONT color="green">280</FONT>        }<a name="line.280"></a>
<FONT color="green">281</FONT>    <a name="line.281"></a>
<FONT color="green">282</FONT>        //-----------------------------------------------------------------------<a name="line.282"></a>
<FONT color="green">283</FONT>        // class to avoid synchronization<a name="line.283"></a>
<FONT color="green">284</FONT>        static class SyncAvoid {<a name="line.284"></a>
<FONT color="green">285</FONT>            /** Unmodifiable list of available locales. */<a name="line.285"></a>
<FONT color="green">286</FONT>            private static List&lt;Locale&gt; AVAILABLE_LOCALE_LIST;<a name="line.286"></a>
<FONT color="green">287</FONT>            /** Unmodifiable set of available locales. */<a name="line.287"></a>
<FONT color="green">288</FONT>            private static Set&lt;Locale&gt; AVAILABLE_LOCALE_SET;<a name="line.288"></a>
<FONT color="green">289</FONT>            <a name="line.289"></a>
<FONT color="green">290</FONT>            static {<a name="line.290"></a>
<FONT color="green">291</FONT>                List&lt;Locale&gt; list = new ArrayList&lt;Locale&gt;(Arrays.asList(Locale.getAvailableLocales()));  // extra safe<a name="line.291"></a>
<FONT color="green">292</FONT>                AVAILABLE_LOCALE_LIST = Collections.unmodifiableList(list);<a name="line.292"></a>
<FONT color="green">293</FONT>                AVAILABLE_LOCALE_SET = Collections.unmodifiableSet(new HashSet&lt;Locale&gt;(availableLocaleList()));<a name="line.293"></a>
<FONT color="green">294</FONT>            }<a name="line.294"></a>
<FONT color="green">295</FONT>        }<a name="line.295"></a>
<FONT color="green">296</FONT>    <a name="line.296"></a>
<FONT color="green">297</FONT>    }<a name="line.297"></a>




























































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